大气氮沉降对三峡库区消落带土壤呼吸的影响

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Abstract An indoor incubation experiment was conducted to reveal the effect of atmospheric nitrogen deposition on soil respiration of water level fluctuating zone in the Three Gorges Reservoir area. The results showed that the response of soil respiration rate to nitrogen addition was a short term effect. Under the present atmospheric nitrogen deposition flux, soil cumulative CO₂ release was not changed by inorganic nitrogen addition, while, it was inhibited by organic nitrogen addition. Except soil cumulative CO₂ release was depressed by ammonium addition of double present atmospheric nitrogen deposition flux, it was promoted by all the simulated atmospheric nitrogen deposition composition under both double and triple present atmospheric nitrogen deposition flux. Compared with ammonium, nitrate was more conducive for promoting cumulative CO₂ release under double and triple present atmospheric nitrogen deposition flux.

Key words： atmospheric nitrogen deposition Three Gorges Reservoir area water level fluctuating zone soil respiration

Received: 15 August 2018

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X142

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	HE Li-ping
	TIAN Mao-ping
	WU Hong
	LIN Jun-jie
	LAN Bo

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HE Li-ping,TIAN Mao-ping,WU Hong等. Effects of atmospheric nitrogen deposition on soil respiration in the water level fluctuating zone of the Three Gorges Reservoir area[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 1132-1138.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I3/1132

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